The Public Room page is underselling this feature, just a bit. It's really a universal link you can embed in your invitations, email footer, web page, or anywhere you want to tell people about your meetings. The page is smart about anonymous (not logged-in users), team members, meeting invitees, and room admins. It's one-stop location for sharing your meeting space.
It's also probably the most underused super-feature.
Here are a few other details about this update: